Yes, this is true. Although its name can make us believe otherwise, white chocolate does not contain cocoa paste. So, this type of chocolate does not have the virtues of cocoa that are found in cocoa paste. Indeed, white chocolate is produced solely from cocoa butter (composed exclusively of fats produced from pressed cocoa beans) mixed with varying quantities (depending on the manufacturer) of milk and sugar to which lecithin and artificial flavors (especially vanilla) are added.
And since white chocolate is completely free of cocoa, which contains a number of strong antioxidants that play an interesting role in the fight against cardiovascular diseases and hypertension, it becomes absolutely deprived from any nutritional interest. In addition, it is much richer in sugar than dark chocolate.
Moreover, the more chocolate is black (and therefore rich in cocoa paste), the more it contains polyphenols (a powerful antioxidant). Thus, while dark chocolate, consumed in adequate quantities, has nutritional assets, other types of chocolate, including white chocolate, must be reserved solely for occasional pleasures.